Cam-driven pump



June 16, 1925.

s.l w. LulTwlELER GAM DRIVEN PUMP Filed Oct. s, 1922 2 Sheets-Sheet 1...IX H

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June 16, 1925. 1,542,313

S. W. LUlTWIELER CAM DRIVEN PUMP Filed Oct. v6. 1922 2 Sheets-Sheet 2INVENTOR SAMUEL glunwmm.

ATTOR N EY pumpsV intended fordomestic orother'small capacity purpose/s,and. it has for its ,pur-y Patented June 16, 1925. =1;;;,,

SAMUEL W. LU'ITWIELER, OF ROCHESTER, NEW YORK.

CAM-DRIVEN PUMP.

Applcationled October 6, 1922. Serial No. 592,889.

T all whom t may 'oo/mcrae.' n

Be it known ,that I, SAMUEL W. LUrrvWIELER, ay citizen` of the UnitedStates `fof America, residing at Rochester, intheV county of MonroevandState of New York,

have invented certain new and useful Imf provements in ACam-DrivenPumps,fof which the following 1s' a specification.

My invention relates to a cam jdriven pump, `more particularly to theyclassy of pose to alford a compact and simplified arrangements of partswhich .can be manufactured at a minimum cost. p Y n A further, purposeof the invention is to provide a mechanism which can be readily andthoroughly lubricated, and which lends itself to a pump of higheiciency, from which water or other liquid can be delivered in acontinuous steady ow at practically constant volume and pressure withoutpulsation or vibration, regardless of the speed at which thepump isdriven, and without necessity of an air chamber.

The. invention also -comprehends other objects and advantages, all ofwhich will be apparent from the following description, in conjunctionwith the accompanying drawings, the novel features being pointed out inthe claims following the specification.

In the drawings:

Figure 1 is a side elevtion, partly in section, illustratinga pump witha preferred embodiment of the invention incorporated therein;

Figure 2 is a horizontal sectional view on the line 2-2 of Figure 1;

Figure 3 is a transverse vertical sectional view on the line 3-3 ofFigure 1;

Figure 4; is a transverse vertical sectional view on the line 4-4 ofFigure 1, and

Figure 5 is a perspective view of the cam* actuated member. y

Referring more particularly to the drawings, in which like referencenumeralsrrefer to corresponding parts throughout the several views, 1designates a conventional type of pump, with the usual inlet and outletvalves, mounted upon a base 2. The pump includes a piston 3 carried bythe piston rod 4 which reciprocates through a stuffing box V5. Thepiston rod 4, is connected to a camactuated member that is located andoper- Vi ated in the manner'now to be described.

On the bB/Se 2 is a cam housing of gen..

.vided cam shaft on lmounted the cam 11.

erally circular form, and comprising a stationary partv 6, formedintegral Vwith thev base 2 and a removable end portion 7 adapted to beattached to the body portion of the housing by the set screws l8. Thesides of the housing aire preferably flat and provided with bearings 9which support a diwhich is fixedly The cam 11 rotates with the shaft 10,travelling around the circular housing, and cooperates with a cam-yactuated member that piston rod 4.

The cam-actuated member is s preferably of integral formation andcylindrical in form, as illustrated in Figure 5, and inis connected tothe cludesthe end portions'12 and 13, and the y central portion 14,which is slotted in right angled planes, the vertical slot 15 serving toreceive the cam 11, and the horizontal slot 1.6 to receive the cam shafty10, and to permit the cam-actuated member to reciprocate upon the camshaft. rJhe piston rod 4 is attached to the cam-actuated member in anyconvenient manner as by threading it therein, and to insure rectilineartravel of the cam-actuated member, the cam housing is provided at itsopposite ends withcylindrical collars 17 and 18 affording cylindricalopenings or guideways that guide the end portions 12 and 13 of thecam-actuated member. n

The end portions 12 and 13 are formed solid at their inner extremities,and are preferably hollow at their outer extremities, by whicharrangement the end portion 12 is permitted to travel over the stuffingboX 5 during its reciprocating movement, thus making it possible toarrange the parts in a small compass. By forming the outer parts of theend portions of the cam-actuated member hollow, a lighter constructionis also afforded which tends both to reducek the cost of the mechanismas well as increasing 1ts efficiency. l

The end portions 12 and 13 of the cam-acthe lubricant from Workingoutwardly at the ends of the housing, suitable packings 24 are employed,which are held in place by the removable rings 25. The guideWays for thecam actuated member are in direct alinement with the piston rod 4, thusinsuring accurate movement, and a straight line travel of the pistonrod, while all the parts of the cam mechanism are thoroughly lubricatedby placing Within the cani housing the necessary amount of lubricant,which is splashed and brought in'to intimate con-I tact With all themoving parts by the rotation of the cam.

Vhile I have described the invention with reference to a particularenibodiinent, it is not to be understood as limited'lto the precisedetails or arrangement disclosed, but this application is intended tocover any modifications or departures from the structure set forth thatmay come Within the ,intended purposes of the improvements or the scopeof the following claim.

I claim: y

The combination with a cam housing having collars at its opposite endsaffording relatively large circular openings constituting guideways, ofa cam rotatable in the housing, a cylindrical one-piece cam-actin atedmember including relatively large cylindrical end portions Which arehollow and travel in the aforesaid gnideways, a piston rod connected toone of said end portions, a stuffing box surrounding said piston rod andadapted to be received by the adjacent hollow end portion asthe lattermoves toward the stufhng box, a cam shaft on which the cam is fixed, thecam-actuated meni'ber also0 including` a cylindrical central portionformed integral with said endv portions and slottedin right-angledplanes to receive the caln and cam shaft respectively, the ca1nactuatedmember having cylindrical transverse openings extending parallel to thecam shaft, and rollers journalled in' said openings an'd engagingopposite points of the cam.

In Witness whereof, signed my name.

SAMUEL 7. LUITVVIELER.

I have hereunto

